摘要
当前110kV变电站隔离开关只能进行停电检修,因操作复杂、检修时间过长,降低了系统供电可靠性,急需研究一种带电更换隔离开关的新方法。从电磁场理论出发,采用有限元分析法对110kV隔离开关进行建模、对作业过程进行仿真分析,得出作业过程中隔离开关周围电磁场分布和变化规律,为现场作业方式和安全防护措施的制定提供理论参考。仿真结果表明:在引流线之间加装分流装置对其进行分流,可有效减少隔离开关周围的电磁场;拆卸引流线夹过程中场强增大迅速,可能会超过临界值,需要对其采取灭弧等保护措施;作业过程中,地表电磁场相对较低,满足标准要求;仿真结果证明了作业方法的可行性。
110 kV isolating switch overhaul is only with power outage. It is complex, and with long maintenance time,resulting in the decrease of the power supply reliability. The research about live replacing isolating switch is in urgent need. Based on electromagnetic field theory, the finite element method was developed to model the isolating switch and simulation analysis was carried out in this paper. They provided theoretical reference for forming maintenance modes and protection measures of live replacing isolating switch. The simulation results show that the electromagnetic field around the switch is rural reduced by installing shunt device between the drainage line and bypass. The field intensity of drainage line increases rapidly in the process of removing drainage line clamp, which can exceed the critical value, and the arc extinction protection is need. In the process of live work, the distributed situation of electromagnetic field on the earth＇s surface is low. It can meet the requirements of standard. They prove the feasibility of the method.
出处
《电力科学与技术学报》
CAS
北大核心
2016年第3期109-115,共7页
Journal of Electric Power Science And Technology
基金
国家自然科学基金(61233008)
国网湖南省电力公司科技项目(5216AD14000N)
关键词
110kV隔离开关
变电站带电作业
有限元法
电磁场分布
110 kV isolating switch
substation live working
finite element method（FEM）
electromagnetic field distribution
